﻿/* Copyright (c) 2010, John Cronin
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the copyright holder nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */

/* Byte operations for a most significant byte ordering assembler */

using System;
using System.Collections.Generic;
using System.Text;

namespace tysila
{
    abstract class MSB_Assembler : Assembler
    {
        public static byte[] SToByteArray(byte v)
        {
            return new byte[] { v };
        }

        public static byte[] SToByteArray(sbyte v)
        {
            if (v >= 0)
                return SToByteArray(Convert.ToByte(v));
            byte v2 = Convert.ToByte(-v);
            return SToByteArray((byte)(~v2 + 1));
        }

        public static byte[] SToByteArray(short v)
        {
            if (v >= 0)
                return SToByteArray(Convert.ToUInt16(v));
            ushort v2 = Convert.ToUInt16(-v);
            return SToByteArray((ushort)(~v2 + 1));
        }

        public static byte[] SToByteArray(ushort v)
        {
            return new byte[] { (byte)((v >> 8) & 0xff),
                (byte)(v & 0xff) };
        }

        public static byte[] SToByteArray(int v)
        {
            if (v >= 0)
                return SToByteArray(Convert.ToUInt32(v));
            uint v2 = Convert.ToUInt32(-v);
            return SToByteArray((uint)(~v2 + 1));
        }

        public static byte[] SToByteArray(uint v)
        {
            return new byte[] {
                (byte)((v >> 24) & 0xff),
                (byte)((v >> 16) & 0xff),
                (byte)((v >> 8) & 0xff),
                (byte)(v & 0xff)
            };
        }

        public static byte[] SToByteArray(long v)
        {
            if (v >= 0)
                return SToByteArray(Convert.ToUInt64(v));

            ulong v2 = Convert.ToUInt64(-v);
            return SToByteArray((ulong)(~v2 + 1));
        }

        public static byte[] SToByteArray(ulong v)
        {
            return new byte[] {
                (byte)((v >> 56) & 0xff),
                (byte)((v >> 48) & 0xff),
                (byte)((v >> 40) & 0xff),
                (byte)((v >> 32) & 0xff),
                (byte)((v >> 24) & 0xff),
                (byte)((v >> 16) & 0xff),
                (byte)((v >> 8) & 0xff),
                (byte)(v & 0xff)
            };
        }

        public static byte[] SToByteArray(IntPtr v)
        {
            return SToByteArray(v.ToInt64());
        }

        public static byte[] SToByteArray(UIntPtr v)
        {
            return SToByteArray(v.ToUInt64());
        }

    }
}
